Drive for diaphragm sorters



Sept. 10, 1935. HAAS 2,014,326

DRIVE FOR DIAPHRAGM SORTERS Filed June 20, 1934 g 4 d I L L L IE2 I v Inventor:

Patented Sept. 10, 1935 UNITED- STATES DRIVE FOB DIAPHRAGM SORTERS Rudolf Haas, Berlin-Dalilem, Germany, assignor of one-half to Zellstofffabrik Waldhof, Mannheim-Waldhof, Germany, a German company Application June 20, 1934, Serial No. 731,567 In Germany July 5, 1933 2 Claims. (01. 92 -3.2)

The invention relates to a device for drivin the oscillating plates of diaphragm sorters such as are used for example in the cellulose and paper industry, the object being primarily to considerably diminish the excessive wear caused by the rapid and strong shaking of the driving parts, and also the corresponding expense for attendance and keeping in order, thus reducing the working costs of these machines as well as increasing their duration of use, and ensuring perfect working for a long period and, above all, the greatest possible freedom from noise.

In view of the driving mechanisms being nat urally underneath the sorting troughs through which flows the water from the material and being consequently inconvenient of access and, as a rule, only inefficiently lighted, a construction is necessary which obviates. as far as possible any lubrication, adjustment or repair.

Numerous constructions have already been suggested to fulfill this object. For example, the oscillating plates have been combined together in pairs by rocking levers, in order to relieve the driving parts from their weight and from the wear arising therefrom. Individual oscillating plates or oscillating levers have also been sup-- ported by springs in order to take up elastically the forces of inertia which arise. Finally, it has been proposed to couple two oscillating levers by a special connecting lever- The drive in common of a large number of systems has been effected from a transmission shaft running longitudinally or by a number of eccentric rods, cam levers, or the like, working in parallel.

All these constructions still leave many points of wear and are thus only an incomplete solu-. tion to the above-mentioned problem.

Contrary thereto, the present invention provides a means of obviating any point of wear in the region of the oscillating plates. The invention consists inthat a plurality of double oscillating levers, connecting each two plates which are successive inthe longitudinal direction, are

' set in oscillation in common by tensioned striplike members such as cords, bands or the like also arranged in .the longitudinal direction. Thus, for example, twenty coupled plates may be driven in this way by a single eccentric, or if desired by a single rotating eccentric centrifugal mass in the known manner.

This construction affords a number of fundamental advantages. In the first place, it renders possible a very considerable reduction in the weight of the oscillating parts, which results in a corresponding diminution of the mass forces occurring heretofore. Since, furthermore, tensioned cords, bands or the like do not require any actual bearings, the assembly is now considerably simplified. At the same time, in the construction according to the application, the possibility of 5 the production of noise and wear in working is' excluded to a considerable extent, this being all the more so since at the remainingv coupling points, the flexible driving parts which are permanently under initial tension, do not suffer any reversal of stress which, as is known, leads to knocking and wear. Finally, also, the space re-, quiredby the oscillating plate driving means in the apparatus according to the application is exextremely small so that for given conditions of 5 space, better accessibility is provided to the various points. The invention is more particularly advantageous when it is combined with the application of resilient joints in allthe points of rotation and 2 engagement of the oscillating levers, so that the necessity for lubrication and attention in the region of the oscillating plates and levers is entirely removed. Such joints in the form of intermediate members, for example rubber blocks or the like, securely connected to the points of engagement in question, while being flexible in themselves are known per se. The inherent flexibility of tensioned cords, bands or the like, in carrying this step into practice, however, renders possible extremely simple types of construction.

The accompanying drawing shows diagrammatically several constructional examples of the invention. r

y In Figure 1 a indicates the sieves through which the fibres of the material are to be sorted. b are the oscillating plates by means of which the diaphragms c are moved up and down. Each pair of oscillating plates are connected together by a double oscillating lever d, in which rotates an eccentric fiy-wheel mass c. This produces'rapid oscillations of the oscillating lever d about the point I at which it is suspended by means of a flexible steel band a from the stationary part of the machine. To the right and left are attached by means of flexible intermediate members It the oscillating plates b, which in consequence of the oscillation of the double lever. d carry out alternately an upward and downward movement,

and thus produce the pulsations, necessary for the intensive sorting of the substance, of the diaphragms c in the space below the sieves a. The members h are preferably of the nature of fabric transmission belting, that is to say several plies of fabric bonded together with rubber.

in which are clamped a wooden bar m and a I belt 11.. The bar m is supported in a hollow 0, while the belt n, on the contrary, is clamped by a strip :1 with a certain initial tension at the end oi the double oscillating "lever d, so that the upward and downward movement of the plate b must take place positively and without a hard blow.

The suspension of the lever d is effected by the stationary axle q of cross shape section being inserted through a square hole and by the four spaces which are created being filled by four rubber pieces 1- pressed in.

Figures 3 and 4 show two diagrammatic general arrangements. In Figure '3, 8 indicates a driving motor with eccentric fly-wheel mass t which is suspended in two steel springs u. The horizontal oscillations of the motor are trans- Ierred by the cords v to the-double oscillating levers d, which, on their part, set the oscillating plates b in movement. The necessary tension of Figure 4 has instead of a fly-wheel mass, an ordinary eccentric drive 2:. In this case, a single spring 11 sumces to produce the tension of the cords v. The double oscillating levers d are mounted on pedestals 2 on the machine base. 5 They are connected with the oscillating plates b by wooden rods 11:, such as are used with most diaphragm sorters of the type at present usual.

I claim:

1. In diaphragm sorters having more than two 10 pairs or oscillating plates disposedin a line longitudinally oi the machine, double oscillating levers connected to each successive pair of plates, flexible strip-like driving members connecting said levers together and to a single driving means, 15 and, means for maintaining said strip-like members continuously under tension during driving.

2. In diaphragm sorters having more than two pairs of oscillating plates disposed in a line longitudinally of the machine, double oscillating 2o levers connected to each successive pair 01' plates by resilient intermediate members, resilient intermediate members supporting said levers so as to be oscillatable about a centre, flexible striplike driving members connecting said levers to- 25 gether and to a single driving means, and means for maintaining said strip-like members continuously under tension during driving.

rumors HAAS. 

